Krok 1 2015 (Biology)

1. Krok 1 – 2015 Biology Base
1. Woman applied to the medico-genetic consulting centre for information
about the risk of haemophilia in her son. Her husband has been suffering
from this disease since birth. Woman and her parents are healthy (don't have
haemophilia). Is the boy likely to have the disease in this family?
A. All boys will be healthy
B. All boys will be ill
C. 50 % of the boys will be ill
D. 25 % of the boys will be ill
E. 75 % of the boys will be ill
2. A man suffering from a hereditary disease married a healthy woman. They
got 5 children, three girls and twoboys. All the girls inherited their father’s
disease. What is the type of the disease inheritance?
A. Dominant, X-linked
B. Autosomal recessive
C. Asutosomal dominant
D. Y-linked
E. Recessive, X-linked
3. Electrocardiogram of a 45-year-old man showed absence of P-wave in all
the leads. What part of the conducting system is blocked?
A. Sinu-atrial node
B. Atrioventricular node
C. Common branch of the bundle of His
D. Branches of the bundle of His
E. Purkinje’s fibres
4. When a patient with traumatic impairment of the brain was examined, it was
discovered that he had stopped to distinguish displacement of an object on
the skin. What part of the brain was damaged?
A. Posterior central gurus
B. Occipital zone of the cortex
C. Parietal zone of the cortex
D. Frontal central gurus
E. Frontal zone
5. Different functional groups can be presented in the structure of L-amino
acid’s radicals. Identify the group that is able to form ester bond:
A. -OH
B. -SH
C. -CONH2
D. -CH3
E. -NH2

2. 6. The conjugated protein necessarily contains special component as a non-
protein part. Choose the substance that can’t carry out this function:
A. HNO3
B. АТP
C. Thiamine pyrophosphate
D. AMP
E. E Glucose
7. Moving of the daughter chromatids to the poles of the cell is observed
in the mitotically dividing cell. On what stage of the mitotic cycle is
this cell?
A. Anaphase
B. Metaphase
C. Telophase
D. Prophase
E. Interfase
8. The patient with diabetes mellitus has been delivered in hospital in the
state of unconsciousness. Arterial pressure is low. The patient has
acidosis. Point substances, which accumulation in the blood results in
these manifestations:
A. Ketone bodies
B. Amino acids
C. Monosaccharides
D. High fatty acids
E. Cholesterol esters
9. A 58-year-old female has undergone surgery for necrotic bowel. Despite
having been treated with antibiotics, on postoperative day 5, she develops
symptoms (fever, hypotension, tachycardia, declining urine output, and
confusion) consistent with septic shock. What hemodynamic support would
be helpful?
A. Fluids and Dobutamine infusion
B. Dobutamine infusion
C. Antibiotic administration
D. Fluid administration
E. Atropine administration
10.It was proved that a molecule of immature mRNA (precursor mRNA)
contained more triplets than amino acids found in the synthesized protein.
The reason for that is that translation is normally preceded by:
A. Processing
B. Initiation
C. Reparation
D. Mutation

3. E. Replication
11. Examination of a patient revealed reduced contents of magnesium ions that
are necessary for attachment of ribosomes to the granular endoplasmatic
reticulum. It is known that it causes disturbance of protein biosynthesis.
What stage of protein biosynthesis will be disturbed?
A. Translation
B. Transcription
C. Replication
D. Aminoacid activation
E. Termination
12. Patient 54 year-old, 5th day after surgical operation. Blood count:
Erythrocytes 3,6*1012/l, Hemoglobin 95 g/l, Erythrocyte’s hemoglobin
content (color index) 0,78; Leukocytes 16*109/l, Platelets 450*10 9/l Blood
picture: anizocytosis, poikilocytosis, reticulocytes-3,8%. What anemia does
this patient have?
A. Acute posthemorragic anemia
B. Acquired hemolytic anemia
C. Anemia from iron deficiency
D. Hypoplastic anemia
E. Chronic posthemorragic anemia
13. The patient with pneumonia was treated with antibiotics for a long
period. After treatment patient complains of frequent and watery stool,
abdomenal pain. What is the reason of intestine function disorder?
A. Intestinal disbacteriosis development
B. Antibiotics toxic influence on the GIT
C. Autoimmune reaction development
D. Bacteria toxins influence
E. Hereditary enzyme defect
14. A 16 year-old patient got numerous traumas in automobile accident.
Now the patient is haning a shock. АP - 80/60 mm Hg. daily urine
volume 60-80 ml. What pathogenic mechanism leads to kidneys
function violation?
A. Decreased hydrostatic pressure in glomerular capillaries
B. Increased osmotic pressure in glomerular capillaries
C. Increased pressure in Bowman’s capsule
D. Increased vasopressin blood concentration
E. Trauma of the urinary bladder
15. A 46 year-old patient has complained of headache, fatigue, thirst, pains in
the spine and joints for the last 2 years. Clinically observed disproportional
enlargement of hands, feet, nose, superciliary arches. He notes that he

4. needed to buy bigger shoes three times. What is the main reason of such
disproportional enlargement of different parts of the body?
A. Cartilaginous tissue proliferation under growth hormone influence
B. Increased sensitivity of the tissues to growth hormone
C. Joints dystrophy development
D. Increased sensitivity of the tissues to insulin
E. Joints chronic inflammation development
16. A 55-year-old patient with continuing ventricular arrhythmias was admitted
to the hospital. The patient is taking timolol drops for glaucoma, daily insulin
injections for diabetes mellitus, and an ACE inhibitor for hypertension. You
have decided to use phenytoin instead of procainamide. What is the reason?
A. The anticholinergic effect of procainamide would aggravate
glaucoma
B. The local anesthetic effect of procainamide would potentiate diabetes
C. The hypertensive effects of procainamide would aggravate the hypertension
D. The local anesthetic effect of procainamide would aggravate the hypertension
E. The cholinergic effects of procainamide would aggravate the diabetes
17. A 25-year-old woman with red and itchy eczematoid dermatitis visits your
office. She had a dental procedure one day earlier with administration of a
local anesthetic. There were no other findings, although she indicated that
she had a history of allergic reactions. Which of the following drugs is most
likely involved?
A. Procaine
B. Cocaine
C. Lidocaine
D. Bupivacaine
E. Etidocaine
18. The CNS stimulation produced by methylxanthines, such as caffeine, is most
likely due to the antagonism of one of the following receptors:
A. Adenosine receptors
B. Glycine receptors
C. Glutamate receptors
D. GABA receptors
E. Cholinergic muscarinic receptors
19. Patients with similar complaints applied to the doctor: weakness, pain in the
intestines, disorder of GIT. Examination of the faeces revealed that one
patient with four nucleus cysts should be hospitalized immidiately. For what
protozoa are such cysts typical?
A. Dysenteric amoeba
B. Intestinal amoeba
C. Balantidium
D. Trichomonas
E. Lamblia

5. 20.According to the data of WHO, for about 250 mln of Earth population fall ill
with malaria. This disease is mostly spread in tropical and subtropical
regions. Range of its spread falls into the areal of the following mosquitoes:
A. Anopheles
B. Culex
C. Aedes
D. Mansonia
E. Culiseta
21. Labeled aminoacids alanine and tryptophane were introducted to a mouse
in order to study localization of protein biosynthesis in its cells. Around
what organellas will the accumulation of labeled aminoacids be observed?
A. Ribosomes
B. Agranular endoplasmic reticulum
C. Cell centre
D. Lysosomes
E. Golgi apparatus
22.Highly injured person gradually died. Please choose the indicator of
biological death:
A. Autolysis and decay in the cells
B. Disarray of chemical processes
C. Loss of consciousness
D. Absence of palpitation
E. Absence of movements
23.After breathing with poisonous steams there is an increased quantity of
slime in respiratory passages of a chemical production worker. What of
respiratory tract epithelial cells participate in mucousa moistening?
A. Goblet cells
B. Fibroblasts
C. Endocrine cells
D. Langergans cells
E. Intercalated cells
24.A patient suffering from thyrotoxicosis symptoms of vegetoasthenic
syndrome was revealed. What of the following would show the histological
appearance of a thyroid gland being stimulated by thyroid-stimulating
hormone (TSH)?
A. Columnar-shaped follicular cells
B. Decreased numbers of follicular cells
C. Increased numbers of parafollicular cells
D. An abundance of colloid in the lumen of the follicle
E. Decreased numbers of parafollicular capillaries

6. 25.The reason of occurrence of some diseases of an oral cavity is connected
with structural peculiarities of its mucous membrane. What morphological
attributes characterize these features?
A. No muscularis mucosa, stratified squamous epithelium
B. Transitional epithelium, no submucosa
C. Simple columnar ciliated epithelium
D. Well developed muscularis, no submucosa
E. Transitional epithelium, no muscularis mucosa
26.There is the change of teeth at the 6-8-year-old children: deciduous are
replaced by permanent. What embrionic tissues are the sources of formation
of permanent teeth tissues?
A. Ectodermal epithelium of a tooth plate and mesenhime
B. Entodermal epithelium of a tooth plate and mesenhime
C. Mesodermal epithelium and mesenhime
D. I, II brachial arches
E. Entodermal epithelium and mesoderm
27. The B cells of endocrine portion of pancreas are selectively damaged by
alloxan poisoning. How will it be reflected in blood plasma?
A. The content of sugar increases
B. The content of fibrinogen decrease
C. The level of sugar decreases
D. The content of globulins decreases
E. The content of albumins decreases
28.In some regions of South Africa there is a spread sickle-shaped cell
anemia, in which erythrocytes have shape of a sickle as a result of
substitution of glutamin by valine in the hemoglobin molecule. What is
the cause of this disease?
A. Gene mutation
B. Disturbance of mechanisms of genetic information realization
C. Crossingover
D. Genomic mutations
E. Transduction
29.A female patient consulted a physician about digestive disorder, extended
abdominal pain. Examination revealed drastic decrease in hemoglobin
concentration. It is known from the anamnesis that while living in the Far
East the patient used to eat freshly-salted caviar. Some relatives living with
her had the similar condition. What is the most likely diagnosis?
A. Diphyllobothriasis
B. Echinococcosis
C. Teniasis

7. D. Trichiniasis
E. Ascaridiasis
30.On autopsy of a still-born infant it is revealed heart development
abnormalities: ventricles are not separated, originates from the right part
single arterial trunk. For what class of vertebrateis such heart construction
characteristic?
A. Amphibian
B. Fishes
C. Reptiles
D. Mammals
E. Birds
31. If strong oxidizers get into the bloodstream, a methemoglobin is formed.
It is a compound, where iron (II) becomes iron (III). What has to be done
to save the patient?
A. Interchangeable hemotransfusion has to be done
B. Patient has to be exposed to the fresh air
C. He has to be calmed down and put to bed
D. He has to be given pure oxygen
E. Respiratory centers have to be stimulated
32.A 10-year-old child complains of weakness, nausea, irritability. Helminthes of
white color and 5-10 mm long were found on the underwear. On microscopy
of the scrape from the perianal folds achromic ova of the unsymmetrical form
were revealed. Indicate what helminth is parasiting on the child?
A. Enterobins vermicularis
B. Ascaris lumbricoides
C. ancylostoma duodenalis
D. Trichina
E. Trichuris
33.Parents with ill child came to the infectionist. They worked in one of the
Asian countries for a long time. Child has eathy colored skin, loss of
appetite, laxity, enlarged liver, spleen, peripheral glands. What protozoan
illness can this child have?
A. Visceral leishmaniasis
B. Balantidiasis
C. Amebiasis
D. Toxoplasmosis
E. Lambliasis
34.White-haired, with blue eyes girl was born in healthy parents. Irritability,
anxiety, troubled sleep and feeding developed in the first months of life of
the infant. What method of genetic investigation should be used for the

8. exact diagnosis?
A. Biochemical
B. Cytological
C. Twin
D. Genealogical
E. Population-statistical
35.The calcium canals of cardiomyocytes have been blocked on an isolated
rabbit's heart. What changes in the heart's activity can happen as a result?
A. Decreased rate and force of heart beat
B. Decreased heart beat rate
C. Decreased force of the contraction
D. Heart stops in systole
E. Heart stops in diastole
36.After the trauma, the patient’s right n.vagus was damaged. Which
violation of the cardiac activity is possible in this case?
A. Violation of the automatism of a Kiss-Fleck node
B. Violation of the automatism of a atrio-ventricular node
C. Violation of a conductivity in the right auricle
D. Block of a conductivity in the atrio-ventricular node
E. Arrhythmia
37. In the ovary specimen colored with hematoxylin-eosin, follicle is
determined where cubic-shaped follicle epithelium cells are placed in 1-2
layers, and scarlet covering is seen around ovocyte. Name this follicle:
A. Primary
B. Primordial
C. Secondary
D. Mature
E. Atretic
38.While studing of the family tree with history of hypertrichosis
(hyperhirsutism of the ear) this sign was founded only in the men and it was
inherited from father to the son. Define the type of hypertrichosis
inheritance?
A. Connected with Y-chromosome
B. Autosomal- recessive
C. Autosomal-dominant
D. Connected with Х-chromosome recessive
E. Connected with Х-chromosome dominant
39.In the perianal folds of a 5-year-old girl her mother has found some
white "worms" that caused itch and anxiety in the child. The "worms"
were sent to the laboratory. During examination the physician saw white
filiform helminths 0,5-1 cm long, with pointed ends, some helminths

9. had twisted ends. What is the most likely diagnosis?
A. Enterobiasis
B. Diphyllobothriasis
C. Teniasis
D. Ascaridiasis
E. Opisthorchiasis
40.Part of the DNA chain turned about 180 degree due to gamma
radiation. What type of mutation took place in the DNA chain?
A. Inversion
B. Deletion
C. Doubling
D. Translocation
E. Replication
41. 46 chromosomes were revealed on karyotype examination of the 5-year-old
girl. One of the 15th pair of chromosomes is longer than usual due to
connected chromosome from the 21 pair. What type of mutation does this
girl have?
A. Translocation
B. Deletion
C. Inversion
D. Insufficiency
E. Duplication
42.A pregnant woman had been having toxicosis with severe repeated vomiting
for 24 hours. In the end of theday thereappearedtetanic convulsions and fluid
loss. What shift of acid-base state caused these changes?
A. Excretory alkalosis
B. Gaseous alkalosis
C. Gaseous acidosis
D. Metabolic acidosis
E. Excretory acidosis
43.Genetic structure of eukaryote is "exon-intron-exon". This structure-
functional organization of gene caused transcription peculiarities. What will
be pro-i-RNA according to the schema?
A. Exon-intron-exon
B. Exon-exon-intron
C. Exon-exon
D. Intron-exon
E. Exon-intron
44.Medical examination at the military registration and enlistment office
revealed that a 15-year-old boy was high, with eunuchoid body proportions,

10. gynecomastia, female pattern of pubic hair distribution. The boy had also fat
deposits on the thighs, no facial hair, high voice, subnormal intelligence
quotient. Which karyotype corresponds with this disease?
A. 47, XXY
B. 45, XO
C. 46, XX
D. 46, XY
E. 47, XXX
45.RNA that contains AIDS virus penetrated into a leukocyte and by
means of reverse transcriptase forced a cell to synthetize a viral
DNA. This process is based upon:
A. Reverse transcription
B. Operon repression
C. Reverse translation
D. Operon depression
E. Convariant replication
46.According to the model of double DNA helix that was suggested by Watson
and Creek, it was established that one of chains would not be lost during
replication and the second chain would be synthesized complementary to
the first one. What way of replication is it?
A. Semiconservative
B. Analogous
C. Identical
D. Dispersed
E. Conservative
47. A teenager was irradiated with high radiation dose that resulted in
serious damages of lymphoid system, lysis of many lymphocytes.
Restoration of normal hemogram is possible due to the functioning of
the following gland:
A. Thymus
B. Thyroid
C. Liver
D. Pancreas
E. Adrenal
48.It was revealed that T-lymphocytes were affected by HIV. Virus enzyme -
reverse transcriptase (RNA-dependent DNA polymerase) - catalyzes the
synthesis of:
A. DNA on the matrix of virus mRNA
B. Virus informational RNA on the matrix of DNA
C. DNA on virus ribosomal RNA
D. Viral DNA on DNA matrix
E. mRNA on the matrix of virus protein

11. 49.A patient after pathological process has a thickened alveolar
membrane. The direct consequence of the process will be the
reduction of:
A. Diffuse lung capacity
B. Oxygen capacity of blood
C. Minute respiratory capacity
D. Alveolar lung ventilation
E. Reserve expiratiory capacity
50.Autopsy of a newborn boy revealed polydactylia, microcephalia,
cheiloschisis and uranoschisis as well as hypertrophy of parenchimatous
organs. These defects correspond with the description of Patau's syndrome.
What is the most probable cause of this pathology?
A. Trisomy of the 13th chromosome
B. Trisomy of the 18th chromosome
C. Trisomy of the 21st chromosome
D. Nondisjunction of sex chromosomes
E. Partial monosomy
51. An ovary specimen stained by hematoxylin-eosin presents a follicle, where
cells of follicular epithelium are placed in 1-2 layers and have cubic form,
there is a bright-red membrane around the ovocyte. What follicle is it?
A. Primary
B. Primordial
C. Secondary
D. Mature
E. Atretic
52.A patient has symptoms of inflammation of urogenital tracts. Examination of
a vaginal smear revealed big monocellular, pear-shaped organisms with the
pointed spike at the posterior end of body, big nucleus and undulating
membrane. What protozoa were found in the smear?
A. Trichomonas vaginalis
B. Trichomonas hominis
C. Trichomonas buccalis
D. Trypanosoma gambiense
E. Lamblia intestinalis
53.During regular examination of schoolchildren it was revealed that a 10
year old girl had asymmetricoval eggs with a larvain the scrape from her
perianal folds. What diagnosis should be made?
A. Enterobiasis
B. Ascariasis
C. Amebiasis

12. D. Trichocephalosis
E. Ankylostomiasis
54.A woman delivered a dead child with multiple developmental defects.
What protozoan disease might have caused the intrauterine death?
A. Toxoplasmosis
B. Leishmaniasis
C. Malaria
D. Amebiasis
E. Lambliasis
55.Tuberculosis can be treated by means of combined chemotherapy that
includes substances with different mechanisms of action.What
antituberculous medication inhibits transcription of RNA into DNA in
mycobacteria?
A. Rifampicin
B. Isoniazid
C. Streptomycin
D. Ethionamide
E. Para-aminosalicylic acid
56.A patient experienced a sudden temperature rise up to 39oС. After 6 hours
the temperature normalized. On the 2-nd day the attack recurred: in the
period of paroxysm the temperature reached 41oС, apyrexial period began
after 8 hours. What type of temperature profile is it?
A. Intermitting
B. Recurrent
C. Hectic
D. Septic
E. Continued
57. Larvae were detected occasionally on the microscopic examination of
the sputum of the patient with pneumonia. Eosinophiles were detected
on the blood examination. What helminthiasis can be diagnosed?
A. Ascariasis
B. Enterobiosis
C. Trichocephaliasis
D. Paragonimiasis
E. Opistorchis
58.You are studying functioning of a bacteria operon. The operator gene has
been released from the repressor gene. Immediately after this the following
process will start in the cell:
A. Transcription
B. Translation
C. Replication

13. D. Processing
E. Repression
59.While studying maximally spiralized chromosomes of human karyotype
the process of cell division was stopped in the following phase:
A. Metaphase
B. Prophase
C. Interphase
D. Anaphase
E. Telophase
60.It is known that the gene responsible for development of blood groups
according to AB0 system has three allele variants. If a man has IV blood
group, it can be explained by the following variability form:
A. Combinative
B. Mutational
C. Phenotypic
D. Genocopy
E. Phenocopy
61. A patient complains of pain in the area of his liver. Duodenal intubation
revealed yellowish, oval, narrowed at the poles eggs with an operculum at
the end. Size of these eggs is the smallest among all helminth eggs. What is
the most probable diagnosis?
A. Opisthorchosis
B. Teniasis
C. Beef tapeworm infection
D. Echinococcosis
E. Diphyllobothriasis
62.A patient consulted an urologist about pain during urination. Analysis of his
urine taken in the daytime revealed eggs with a characteristic sharp point. It
is known from the anamnesis that the patient has recently returned from
Australia. What is the most likely diagnosis?
A. Urogenital schistosomiasis
B. Intestinal schistosomiasis
C. Japanese schistosomiasis
D. Opisthorchiasis
E. Dicroceliasis
63.A child complains of general weakness, loss of appetite, a troubled sleep,
itching in the perianal area. The provisional diagnosis is enterobiasis. In
order to specify this diagnosis it is necessary toperform:
A. Scraping from perianal folds
B. Roentgenoscopy

14. C. Biopsy of muscle tissue
D. Immune diagnostics
E. Duodenal contents analysis
64.The cell of the laboratory animal was overdosed with Roentgen rays. As a
result albuminous fragments formed in the cytoplasm. What cell organoid
will take part at their utilization?
A. Lysosomes
B. Golgi complex
C. Ribosome
D. Endoplasmic reticulum
E. Cells centre
65.In course of practical training students studied a stained blood smear of
a mouse with bacteria phagocyted by leukocytes. What cell organella
completes digestion of these bacteria?
A. Lisosomes
B. Mytochondrions
C. Granular endoplasmic reticulum
D. Golgi apparatus
E. Ribosomes
66.A woman with ІІІ (B), Rh- blood group born a child with ІІ (A) blood group.
The child is diagnosed with hemolytic disease of newborn as a result of
rhesus incompatibility. What blood group is the child's father likely to have?
A. ІІ (A), Rh+
B. I (0), Rh+
C. III (B), Rh+
D. I (0), Rh-
E. II (A), Rh-
67. Twodays after consumption of smoked pork a patient got face and eye-lid
edemata, gastrointestinal disturbances, abrupt temperature rise, muscle
pain. Blood analysis showed full-blown eosinophilia. What helminth could
the patient be infected with?
A. Trichina
B. Pinworm
C. Ascarid
D. Whipworm
E. Hookworm
68.A lymph node punctate of a patient with suspected protozoal disease was
examined. Examination of the stained specimen (Romanovsky's stain)
revealed some crescent bodies with pointed end, blue cytoplasm and red
nucleus. What protozoan were revealed in the smears?
A. Toxoplasms

15. B. Malarial plasmodiums
C. Dermotropic leishmania
D. Viscerotropic leishmania
E. Trypanosomes
69.The guide of the scientific expedition in India was native who always was
with his dog. What invasive diseases can be transmitted by the dog if it is
the source of invasion?
A. Echinococcosis
B. Teniasis
C. Paragonimiasis
D. Dicroceliasis
E. Fascioliasis
70.A patient has acne on his face. Microspcopic examination of scrapings from
the affected areas revealed living porrect vermiform arthropoda 0,2-0,5
mm large with four pairs of short extremities in the front part of their
bodies. What is the laboratory diagnosis?
A. Demodicosis
B. Scabies
C. Myiasis
D. Pediculosis
E. Phthiriasis
71. A family of students who came from Africa got a child with anemia signs. The
child died soon. Examination revealed that the child's erythrocyteshave
abnormal semilunar shape. Specify genotypes of the child's parents:
A. Аа х Аа
B. Аа х аа
C. АА х АА
D. аа х аа
E. Аа х АА
72. Examination of cell culture got from a patient with lysosomal pathology
revealed accumulation of great quantity of lipids in the lysosomes. What of the
following diseases is this disturbance typical for?
A. Tay-Sachs disease
B. Gout
C. Phenylketonuria
D. Wilson disease
E. Galactosemia
73. A 39-year-old woman has madescence in the region of mammilla, a small
ulcer with inflammatory hyperemia and cutaneous edema. Histologic
examination of tissue sampling from this area revealed in the malpighian

16. layer of thickened epidermis atypical cells with light and optically empty
cytoplasm, with no intracellular bridges. Such cells were also found in the
orifice of big mammal gland ducts. What is the most probable diagnosis?
A. Paget's disease
B. Intraductal cancer
C. Basal cell carcinoma
D. Epidermoid cancer
E. Melanocarcinoma
74. Golgi complex exports substances from a cell due to the fusion of the
membrane saccule with the cell membrane. The saccule contents flows
out. What process is it?
A. Exocytosis
B. Endocytosis
C. Active transport
D. Facilitated diffusion
E. All answers are false
75. A patient working at a pig farm complains about paroxysmal abdominal
pain, liquid feces with admixtures of mucus and blood, headache, weakness,
fever. Examination of large intestine revealed ulcers from 1 mm up to several
cm large, feces contained oval unicellular organisms with cilia. What disease
should be suspected?
A. Balantidiasis
B. Amebiasis
C. Toxoplasmosis
D. Lambliasis
E. Trichomoniasis
76. A boy found a spider with the following morphological characteristics: it
is 2 cm long, has roundish black abdomen with two rows of red spots on
its dorsal side; four pairs of jointed limbs are covered with small black
hairs. What arthropod is it?
A. Karakurt spider
B. Scorpion
C. Solpuga
D. Mite
E. Tarantula
77. Normal, actively dividing cells of human red bone marrow are analyzed.
What number of cells' chromosomes is typical for G1 period?
A. 46
B. 48
C. 47
D. 45
E. 23

17. 78. A man has worked in an African country for 3 years. A month after his
return to Ukraine he consulted an ophthalmologist and complained about
eye ache, eyelid edema, lacrimation and temporary visual impairment.
Underneath the eye conjunctiva the doctor revealed helminths 30-50 mm
long with elongated filiform body. What diagnosis might be suspected?
A. Filariasis
B. Diphyllobothriasis
C. Ascaridiasis
D. Enterobiasis
E. Trichocephaliasis
79. Life cycle of a cell includes the process of DNA autoreduplication. As a result
of it monochromatid chromosomes turn into bichromatid ones. What
period of cell cycle does this phenomenon fall into?
A. S
B. Go
C. G1
D. G2
E. M
80.A 28-year-old female patient consulted a gynecologist about sterility.
Examination revealed underdeveloped ovaries and uterus, irregular
menstrual cycle. Analysis of the sex chromatin revealed 2 Barr’s bodies in
most somatic cells. What chromosome disease is most likely?
A. Triple X Syndrome
B. Edwards Syndrome
C. Patau’s Syndrome
D. Klinefelter’s Syndrome
E. Turner’s Syndrome
81. A cell at the stage of mitosis anaphase was stimulated by
colchicine that inhibits chromosome separation to the poles. What
type of mutation will be caused?
A. Polyploidy
B. Inversion
C. Deletion
D. Duplication
E. Translocation
82.A patient in a transplantation centre underwent heart transplantation. The
organ was taken from a donor who died in a road accident. Foreign heart
can be rejected as a result of development of transplantation immunity. It is
usually prevented by means of:
A. Immunosuppressors
B. Chemotherapy
C. Ultrasound
D. Enzymes

18. E. X-ray therapy
83.Following exposure to radiation a lot of mutant cells appeared in a patient.
Some time later most of them were detected and destroyed by the following
cells of the immune system:
A. T-lymphocytes-killers
B. Plasmoblasts
C. T-lymphocytes-supressors
D. B-lymphocyte
E. Stem cells
84.A gynaecologist was examining a patient and revealed symptoms of genital
tract inflammation. A smear from vagina contains pyriform protozoa with a
spine, flagella at their front; there is also an undulating membrane. What
disease can be suspected?
A. Urogenital trichomoniasis
B. Lambliasis
C. Intestinal trichomoniasis
D. Toxoplasmosis
E. Balantidiasis
85.A boy has I (I^0I^0) blood group and his sister has IV (I^AI^B) blood
group. What blood groups do their parents have?
A. II (IА I0) and III (IВI0)
B. II (IАIА) and III (IВI0)
C. I (I0I0) and IV (IAIB)
D. III (IВI0) and IV (IAIB)
E. I (I0I0) and III (IВI0)
86.For the purpose of myocardium infarction treatment a patient was
injected with embryonal stem cells derived from this very patient by
means of therapeutic cloning . What transplantation type is it?
A. Autotransplantation
B. Allotransplantation
C. Xenotransplantation
D. Isotransplantation
E. Heterotransplantation
87. An alcoholic woman has born a girl with mental and physical
developmental lag. Doctors diagnosed the girl with fetal alcohol
syndrome. What effect is the cause of the girl's state?
A. Teratogenic
B. Mutagenic
C. Malignization
D. Carcinogenic
E. Mechanic

19. 88.Sex chromosomes of a woman didn't separate and move to the opposite
poles of a cell during gametogenesis (meiosis). The ovum was impregnated
with a normal spermatozoon. Which chromosomal disease can be found in
her child?
A. Turner's syndrome
B. Down's syndrome
C. Patau's syndrome
D. Edwards' syndrome
E. Cat cry syndrome
89.Hartnup disease is caused by point mutation of only one gene which results
in disturbance of tryptophane absorption in the bowels and its resorption in
the renal tubules. It is the reason for disorder of both digestive and urination
systems. What genetic phenomenon is observed in this case?
A. Pleiotropy
B. Complementary interaction
C. Polymery
D. Codominance
E. Semidominance
90.Cytogenetic examination of a patient with reproductive dysfunction revealed
normal karyotype 46 ХY in some cells, but most cells have karyotype of
Klinefelter's syndrome - 47 ХХY. Such cell heterogenity is called:
A. Mosaicism
B. Inversion
C. Transposition
D. Duplication
E. E Monomorphism
91. As a result of prophylactic medical examination a 7 year old boy was
diagnosed with Lesch-Nyhan syndrome (only boys fall ill with it). The
boy's parents are healthy but his grandfather by his mother's side
suffers from the same disease. What type of disease inheritance is it?
A. Recessive, sex-linked
B. Dominant, sex-linked
C. Autosomal recessive
D. Autosomal dominant
E. Semidominance
92.A doctor revealed tissues injury on patient's scalp with localized
suppurations and diagnosed his disease as myiasis. This infestation is
caused by larvae of the following insect:
A. Wohlfahrt fly
B. Kissing bug
C. Stable fly

20. D. Malarial mosquito
E. Mosquito